Numerical expressions for the computation of coincidence-summing correction factors in γ-ray spectrometry with HPGe detectors

Numerical expressions to compute γ-γ and γ-XK coincidence summing corrections were deduced by using a suitable computer program and a matrix representation of a decay scheme. For point sources only full-energy peak and total efficiencies are needed. Alternatively, values of peak-to-total ratio can be introduced. For extended sources, the same expressions can be considered with the introduction of “effective efficiencies”. Examples of the use of the expressions for point sources and a particulate filter sample measured with a 60% relative efficiency HPGe detector are reported.